Pioneer TS-SW841D Shallow-mount 8" 4-ohm subwoofer at Crutchfield
Pioneer A-Series 8 in. Shallow-Mount Pre-Loaded Enclosure TS-A2000LB - The Home Depot
Amazon.com: Pioneer TS-SW2002D2 8-inch Shallow-Mount Subwoofer with 600 Watts Max Power : Electronics
Pioneer TS-A2000LD2 Shallow-mount 8" subwoofer with dual 2-ohm voice coils at Crutchfield
Pioneer TS-W304R 12" Subwoofer - Walmart.com
Buyr.com | Component Subwoofers | PIONEER Alphasonik AS8DF 8 inch 600 Watts 4-Ohm Down Fire Shallow Mount Flat Enclosed Sub woofer for Tight Spaces in Cars and Trucks, Slim Thin Loaded Subwoofer
Amazon.com: Pioneer TS-M800PRO 8-Inch PRO Series High Efficiency Mid-Bass Car Speaker Drivers - Pair (Discontinued by Manufacturer), Black : Electronics
Pioneer PRO Series 12" 1,500-Watt Subwoofer in the Mobile Audio department at Lowes.com